WO2004038499A1 - Systeme d'illumination pour visualisation d'images sans rupture de couleurs - Google Patents
Systeme d'illumination pour visualisation d'images sans rupture de couleurs Download PDFInfo
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- WO2004038499A1 WO2004038499A1 PCT/EP2003/050708 EP0350708W WO2004038499A1 WO 2004038499 A1 WO2004038499 A1 WO 2004038499A1 EP 0350708 W EP0350708 W EP 0350708W WO 2004038499 A1 WO2004038499 A1 WO 2004038499A1
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- Prior art keywords
- filter
- image
- spatial light
- light modulator
- display system
- Prior art date
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- 238000005286 illumination Methods 0.000 title claims description 25
- 238000006073 displacement reaction Methods 0.000 claims abstract description 48
- 239000011159 matrix material Substances 0.000 claims abstract description 22
- 239000003086 colorant Substances 0.000 claims description 21
- 230000033001 locomotion Effects 0.000 claims description 20
- 230000010354 integration Effects 0.000 claims description 19
- 238000004737 colorimetric analysis Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 description 7
- 238000013519 translation Methods 0.000 description 6
- 230000014616 translation Effects 0.000 description 6
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- 230000003287 optical effect Effects 0.000 description 4
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- 238000000034 method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
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- 238000003786 synthesis reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133621—Illuminating devices providing coloured light
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
- H04N9/3117—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing two or more colours simultaneously, e.g. by creating scrolling colour bands
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
Definitions
- a system for displaying images using a spatial light modulator is provided.
- ono-imager architectures a- the one where all the pixels (image elements) of the imager always see the same color: “all red”, “all green”, or “all blue”; this is achieved by using a colored wheel that spins in front of the imager. This mode is called “color sequential”.
- b- the one where the scanning of the imager takes place "line not line” (case of "color scrolling” in English terminology). All the pixels of a group of lines in the imager see the same color, so that, for each line, there is successively a line “all red”, a line “all green”, and a line “all blue ". This effect can be obtained by using a rotating filter striated with helical colored bands.
- Projection or rear projection systems can therefore be presented in various configurations.
- the invention relates to single-display configurations, operating in color sequential and which may have a plane accessible upstream of the main imager and optically conjugated therewith. It is known, for example from document US2002 / 0024618, that such systems operating in color sequential mode induce, risks of color breaks during projection (or color break-up), which cause the appearance of multiplied outlines and colored on the images displayed, when these images are in motion or when the observer moves his gaze over the projected image. These color breaks come from the fact that the three sub-frames of primary red, green and blue images, which, after integration by the eye, form the same overall polychrome image, are displayed one after the other and therefore at different times.
- the polychromatic image to be displayed is then sequentially composed by alternating the illumination color of each of the pixels within each group.
- the illumination colors of the adjacent pixels of the same subframe are mixed by juxtaposed additive synthesis; as each sub-frame is no longer, as before, monochrome, the observer no longer perceives color breaks when his gaze moves over the image or when the image is in motion.
- the invention provides an improvement to the general solution taught by document US2002 / 0024618 which makes it possible to obtain, in a much simpler manner than in the embodiments described in this document, full color illumination of the matrix display during each subframe: indeed, to obtain this polychrome illumination, it is proposed - to use a matrix filter formed by a mosaic of elementary monochrome filters, to illuminate this filter by a generally white polychrome source, and to make the image of this filter thus lit on the input face of the spatial modulator, - to use means to move the image of this filter from one sub-frame to another, so as to alternate the illumination color of each of the pixels or set of pixels of this modulator.
- the invention thus makes it possible to solve the problem of color disruption in a much simpler way than in the prior art.
- the invention therefore relates to an image display system using a spatial light modulator comprising: • a light source emitting an illumination beam;
- a spatial light modulator comprising a matrix of pixels controlled by video control signals corresponding to a succession of image frames to be displayed;
- a matrix filter formed by a mosaic of elementary filters of different colors, illuminated by said illumination beam and transmitting a spatially filtered beam in colors to the spatial light modulator, • Means for producing an image of said filter on an input face of the spatial light modulator;
- Displacement means for moving the image of the filter on the input face of the spatial light modulator
- a device for controlling these displacement means making it possible to control at least one sequence of displacements of the image of the filter during each image frame.
- the control device is suitable for controlling the movements of the image of the filter in synchronism with the video control signals of the spatial light modulator.
- each displacement of a sequence corresponds to a multiple of the dimension of the image of an elementary filter on the input face of the spatial modulator.
- the dimensions and the position of the elementary filters are adapted so that the image of each of them on the input face of the spatial modulator covers a plurality of pixels.
- the dimensions of each elementary filter are then such that they allow the illumination of an integer greater than one of the pixels of the spatial light modulator. That is to say that each elementary filter is adapted to simultaneously illuminate several adjacent pixels during each image subframe.
- each elementary filter corresponds to inter-pixel spaces on the input face of the modulator; color mixing within the same pixel is thus avoided.
- Each elementary filter then makes it possible to illuminate the whole of several pixels.
- the mosaic can be monodimensional, in the sense that it comprises for example only one column of elementary filters of different colors; each elementary filter then forms a monochrome colored band extending over the entire width of the filter.
- each image subframe all the pixels of a group of lines of the spatial modulator then simultaneously see the same color.
- each line of pixels is successively lit in red, green, and blue. The invention then makes it possible to obtain, in a very simple manner, a scrolling of color bands on the spatial modulator.
- the mosaic is two-dimensional and the elementary monochrome filters are arranged in several lines and in several columns;
- the spatial light modulator comprises a two-dimensional matrix of pixels each formed by an optical valve and arranged in rows and columns, the image direction of the elementary filter lines on the input face of the modulator corresponds to that of the lines pixels, and the image direction of the elementary filter columns on the input face of the modulator corresponds to that of the pixel columns;
- the optical valves can be liquid crystal cells or micro-mirror elements.
- said mosaic is formed by the repetition of blocks of elementary filters, these blocks having identical contours and being each composed of at least two elementary filters of different colors; since all the blocks have the same contours, that is to say the same geometry, each block therefore comprises the same number of elementary filters; in the filter, the distributions of the elementary filters of different colors in the blocks can be different from one block to another.
- each block has three elementary filters: a red, a green and a blue.
- a block comprises more than two filters which are adjacent but are not aligned.
- a block comprises more than two filters which are adjacent and aligned.
- these blocks are then arranged so that the elementary filters of the same color are aligned in a direction inclined with respect to that of the rows and that of the columns of elementary filters.
- such blocks will then be placed offset from each other so as to obtain patterns in which the elementary filters of the same color are aligned in inclined directions; preferably, two rows will be interchanged between them and / or two columns between them.
- Such a filter will be easy to design and use while blurring the pattern formed by the groups of blocks.
- the filter comprises the same number of elementary filters of each color in the different rows and in the different columns of the filter. It is also possible to provide for the mosaic to be an assembly of identical patterns each comprising the same number of blocks and the same number of elementary filters of each color in each of the rows and in each of the columns of elementary filters of this pattern. This will more surely provide a white image for each pixel of the spatial light modulator which is in the on state.
- the displacement means are adapted to move the image of the mosaic filter transversely to the direction of the illumination beam.
- the displacement means comprise a light deflection device, located between the matrix filter and the spatial light modulator; this device is suitable for moving the image of the filter on the input face of the modulator; the device then controls the deflection, by the deflection device, of the spatially filtered illumination beam, which leads to displacements of the image of the filter on the input face of the spatial light modulator.
- the deflection device comprises an adjustable mirror; the matrix filter and the spatial light modulator are then arranged symmetrically with respect to a beam-splitting surface; the system then comprises an imaging optic receiving the light emitted by the matrix filter, retransmitting it to the mirror which reflects it towards the separating surface via the imaging optics, which separating surface reflects the light towards an entry face of the spatial light modulator, an image of the matrix filter being thus formed on the input face of the spatial light modulator, this image being able to be moved on this input face by rotation of the orientable mirror.
- each pixel of the spatial light modulator is successively lit by all the elementary filters of a block under the effect of a first sequence of displacements, then by all the elementary filters of another block under the effect of a second sequence of displacements.
- the invention makes pirating using camcorders even more difficult.
- the invention will make it possible to display, with a random sequence, images having colored structures when they are viewed by a camcorder. These colored structures are not visible to the eye on the image projected from the spatial modulator, because the eye achieves a sliding analog average of the different subframes. These colored structures will however be visible on the videotape of the camcorder having recorded the projected image, since the temporal sampling carried out by the camcorder can no longer correspond to the temporal sampling of the image sub-frames displayed by the spatial modulator of the system according to the invention.
- the interference of the video image from the camcorder may dissuade from marketing such pirated video.
- all the movement sequences controlled by the control device are adapted so that the integration of the images of the filter obtained on all the displacements of the sequence or sequences of each frame brings white colorimetry to the input face of the spatial light modulator. If each frame has only one sequence, each sequence alone provides white colorimetry. If each frame comprises a combination of sequences, each combination of sequences provides white colorimetry without, however, that each sequence alone provides white colorimetry.
- each frame comprises a first sequence and at least a second sequence
- these sequences are then preferably adapted so that the integration of the images of the filter obtained over all of the displacements of any one of these sequences provides a non-white colorimetry at the input face of the spatial light modulator; as only the succession of several sequences provides white colorimetry, such an arrangement will lead to deteriorating the images of the spatial light modulator filmed by a camcorder.
- the control device has the characteristics of different combinations of at least two sequences of movements, chosen from a plurality, each combination making it possible to provide a white colorimetry of the input face of the spatial light modulator. The control device then selects, from among these combinations, different combinations for successive frames. It is not essential to change the combination between each frame, but only between certain frames, which can be chosen at random. Preferably, the combination selection from the plurality is also random.
- said control device has the characteristics of a plurality of different sequences of movements making it possible to provide white colorimetry to the input face of the spatial light modulator and that this device selects, from among this plurality, different sequences for successive frames. If the integration time of an image recorded by a camcorder overlaps two frames of different sequences, this will advantageously result in a deterioration of the images of the spatial light modulator filmed by this camcorder. It is not essential to change the sequence between each frame, but only between certain frames, which can be chosen at random. Preferably, the selection of sequences from the plurality is also random.
- This system comprises a light source preferably emitting a beam of white light allowing to illuminate a spatial light modulator 2.
- This spatial light modulator comprises a set of pixels (image elements) arranged in a matrix form and is for example a liquid crystal valve.
- a filter 3 makes it possible to spatially filter the different wavelengths corresponding to the colors red, green and blue so as to illuminate the spatial light modulator 2 with beams of different colors.
- a transmission optic 4 makes it possible to image each point of the filter 3 in substantially the plane of the spatial light modulator 2.
- an output optic 6 makes it possible to configure the beam transmitted by the spatial light modulator.
- the filter 3 has a set of elementary filters of different colors (that is to say of filtering characteristics at different wavelengths). Preferably, each elementary filter makes it possible to illuminate an integer greater than 1 of pixels of the spatial light modulator.
- FIG. 2 represents an example of a filter according to the invention produced in the form of a two-dimensional matrix, that is to say organized in rows and columns, of elementary filters red (R), green (V) and blue ( B). The distribution of the various elementary filters R, G and B will be explained later.
- a control device 5 makes it possible to move the spatial filtering of the illumination beam, which amounts to moving the image of the filter 3 on the input face of the spatial light modulator 2. As shown in FIG. 1, the control device 5 can control this movement:
- a deflection of the beam transmitted to the spatial light modulator is obtained by controlling a rotation of the device 7 as indicated by the arrow R.
- the control device 5 thus controls the movement of the image of the filter on the input face of the spatial light modulator 2. This movement takes place step by step in two orthogonal directions so that the image of the filter moves over the input face of the spatial light modulator in two orthogonal directions parallel to the rows and the columns. At each displacement, the displacement pitch is equal to a multiple of the distribution pitch of the images of the elementary filters of the filter 3 on the input face of the spatial light modulator.
- the elementary filter located at point p3 is of a determined color, for example red and the pixel located at point p2 of the spatial light modulator is illuminated with red light.
- the elementary filter located at the same point p3 is green (for example) and the pixel of the point p2 is lit by green light.
- the elementary filter located in p3 can then be blue and the pixel located in p2 is lit by blue light.
- the distribution of the elementary filters R, G and B of the filter 3 is carried out in such a way that by providing appropriate displacements of the filter, one obtains a light which is on average perceived as white for all the pixels of the spatial light modulator when these pixels are in the passing state for the different positions of displacements and that during a time of integration suitable for the eye.
- control device induces a displacement of the image of the filter on the input face of the spatial light modulator by deflection of the beam transmitted by the filter for example, the operation is similar.
- a synchronous signal processing will supply the imager with video signals combining the initial images of the three colors in a pattern identical to that of the color filters.
- the control device 5 will operate in synchronism with the video signals.
- Each sub-image will then contain pixels of the three colors, according to a random or pseudo-random pattern, which will no longer place color outlines at different times but will distribute them over time. This will mitigate the phenomenon of color breakdown.
- FIG. 3 represents an exemplary embodiment of a projection system using the illumination system according to the invention.
- the light source 1 the filter 3, the optics 4, the spatial light modulator 2, the output optics 6, the beam deflection or translation device 7 and the control device 5 of FIG. 1.
- a light integrating device which can be produced in the form of an integrating bar 10, is interposed between the source 1 and the filter 3 to provide uniform illumination of the surface of the filter 3 and consequently of the surface of the spatial light modulator.
- a beam splitter 8 associated with the input face of the spatial light modulator whose opposite face is reflective or is provided with a reflection device 12.
- the light coming from the filter is transmitted to the spatial light modulator which spatially modulates it and reflects it towards the separator, which then reflects the light towards the exit optics 6.
- the light polarization means necessary for the operation of the spatial light modulator are well known in the art and are not shown in the figure.
- the control device 5 makes it possible to move the filter 3 in two perpendicular directions DX and DY contained in a plane transverse to the direction of the beam transmitted by the integrating bar 10 so as to move the image of the filter on the input face of the spatial light modulator.
- a deflection or beam translation device 7 controlled by the device 5 allows this displacement of the image of the filter to be carried out on the input face of the spatial light modulator.
- the filter 3 and the spatial light modulator 2 are arranged symmetrically with respect to a surface 19 separating the light.
- this surface 19 is the separating surface of a beam separating cube 18.
- the filter 3 is provided with a reflection device 13 so that the light which it receives from a light source and from an integrating device 10 by a beam splitter 11 and by the separating surface 19 is reflected towards an optical system. 4 and a mirror 17. The light reflected by the mirror 17 is returned by the optics 4 and the separating surface 19 to the spatial light modulator 2.
- the light therefore makes a double pass through optics 4;
- This is designed as a double Gauss optic in such a way that due to the positions symmetrical of the filter 3 and of the spatial light modulator 2 with respect to the separating surface 19, as well as of the double passage of the light in optics 4, the surface of the filter is imaged on the input surface of the spatial light modulator 2 with magnification of 1 and without distortion.
- the mirror 17 is movable around two perpendicular axes XI and X2.
- Rotation commands Ri and R2 controlled by the device 5 makes it possible to move the image of the filter 3 on the input face of the spatial light modulator in two perpendicular directions, in particular horizontally and vertically.
- the spatial light modulator 2 is provided on its face opposite to its input face with a reflection device 12.
- the light coming from the filter 3 and illuminating the spatial light modulator is therefore reflected towards the output objective 6.
- the polarization means necessary for the operation of the system are perfectly known in the art and are therefore not shown in the figure.
- this filter comprises a matrix of colored elementary filters, that is to say having filtering characteristics in different optical wavelengths.
- the distribution of the elementary filters is such that the filter 3 has a repetition of patterns each consisting of a determined number of elementary filters.
- the figures 5b and 5c represent a pattern of 3x3 elementary filters
- FIGS. 5d and 5e represent a pattern of 6x6 elementary filters. It is obvious that a pattern could have more elementary filters.
- One method for obtaining these patterns is as follows
- the distribution of the elementary filters R, G and B can be different in the different blocks of three elementary filters.
- the block Ml is different from the block M2 with regard to the distributions of the elementary filters R, G and B.
- the colors of the elementary filters are distributed randomly over the different shapes, however preferably respecting global homogeneity criteria (for example: same number of pixels of each color for the rows and columns of the matrix).
- a starting position will be defined for the displacement device among all the possible positions (for example for an excursion of ⁇ 2 pixels in each direction 25 positions are possible, 9 positions for ⁇ 1 pixel in each direction ). This position will generate the first sub-frame by imagining red, green and blue pixels through the patterns of filter 3.
- FIG. 5f represents the image of the filter on the input face of the spatial light modulator.
- figure 5a being distributed regularly in the pattern of figure 5b and consequently, in the filter of figure 5c, one thus sees that all the positions such as X of the spatial light modulator will have been lit by light red, green and blue and this after two displacements of the image of the filter on the surface of the spatial light modulator. If all the pixels of the spatial light modulator are passing during this entire sequence, the observer then observes a light transmitted by the modulator which is the combination of red, green and blue and which is therefore white.
- FIG. 6a represents the image of the filter on the useful part of the spatial light modulator in the form of a matrix of numbers. Each number represents a color:
- the unit digit will represent blue, the tens digit for green and the hundreds digit for red. This means that a point represented by a number 110, for example, will contain red and green but will not contain blue.
- FIG. 6b represents the image that an observer who observes the image displayed by the spatial light modulator should perceive. This image is currently that of the filter image. In particular the point of line 8 and column 8 has the value 10 (green).
- An observer should perceive, in Figure 6h, the superposition of the image of Figure 6f and the image of Figure 6g.
- the point in line 8 and in column 8 is 220 and it should perceive an overlay of red and green (yellow color).
- An observer should perceive, in figure 6j, the superposition of the image of figure 6i and the image of figure 6h.
- the point in row 8 and column 8 is 221 and the observer should perceive an overlay of red, green and blue, with a lower intensity of blue.
- displacement sequences can be selected to have a white colorimetry of the spatial light modulator when the pixels thereof are passing.
- the invention therefore provides for establishing a selection of these displacement sequences and for giving each of them their characteristics such as the origin position of displacement and the types of displacement according to two coordinates in X and in Y. Then, the invention provides for choosing a sequence of displacements for each frame. The sequence of movements may be different from one frame to the next, but this may very well not be systematic and be decided randomly.
- Another method to obtain other valid movement sequences is to swap the movement orders within the same sequence. This amounts for example to swapping between them the first three points and between them the last three points of the above path.
- the sequence deduced from the first sequence described above is thus obtained:
- the controller 5 will control the movement sequence changes. These changes will preferably take place between two image frames.
- the device will choose in a predetermined way, or randomly, the movement sequences to be used.
- the control device 5 will be supplied with a list of combinations of sequences making it possible to obtain white colorimetry of the image of the filter.
- each sequence of movements taken alone will not make it possible to obtain a white colorimetry, which will be useful for combating piracy, using a camcorder, of the images displayed by the spatial light modulator as will be highlighted below.
- the disturbance to the video signal appears when there is no correspondence between the sampling time of a camcorder and the display time of the subframes.
- the three subframes a, b and c acquired by a camcorder for integration 1 do not represent the output state of the camcorder but the progress of integration of the light signal.
- the output image is the third sub-frame (sub-frame c for integration 1).
- the display was produced using the following displacement sequences:
- FIGS. 7a to 7c there is shown the operation relating to a part of the filter of Figure 5f (the part located at the top left of Figure 5f).
- the left parts of these figures show the successive images of the filter projected on the spatial light modulator during each movement.
- the integration of the images on the spatial light modulator has been represented and these images correspond to those of the right part of FIGS. 6a to 61.
- integration 1 by the camcorder is out of phase with the projected images. We note in these figures that the results of integration do not correspond to expectations.
- This variant relates to the production of a filter using simpler blocks such as that shown in FIG. 8a.
- This arrangement in particular reduces the proximity of blocks of the same color. It is obtained by juxtaposing linear blocks in which the three colors R, G and B are aligned.
- the displacement of the filter is advantageously done in one direction, in X or in Y, and three subframes are sufficient here to reach the white state (see Figure 8b).
- Diagonal color alignment can be a problem when viewing. This can be countered by advantageously inverting two or two rows or columns in order to blur the pattern while avoiding juxtaposing the same color twice. Thus in FIG. 8c, columns 4 and 5 and rows 4 and 5 have been inverted.
- system of the invention is applicable to systems providing an intermediate display between the source and the spatial light modulator 2 and making it possible to provide a relay image.
- the filter 3 can advantageously be associated with this intermediate display.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004546037A JP4642470B2 (ja) | 2002-10-28 | 2003-10-13 | 色分裂なしに画像を表示するための照明システム |
EP03780165A EP1557046A1 (fr) | 2002-10-28 | 2003-10-13 | Systeme d illumination pour visualisation d images sans rupture de couleurs |
AU2003288267A AU2003288267A1 (en) | 2002-10-28 | 2003-10-13 | Illumination system for displaying images without colour break |
US10/532,179 US7461940B2 (en) | 2002-10-28 | 2003-10-13 | Illumination system for displaying images without color break |
MXPA05004473A MXPA05004473A (es) | 2002-10-28 | 2003-10-13 | Sistema de iluminacion para la visualizacion de imagenes sin ruptura de color. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0213981 | 2002-10-28 | ||
FR0213981A FR2846435A1 (fr) | 2002-10-28 | 2002-10-28 | Systeme d'illumination pour visualisation d'image sans rupture de couleurs |
Publications (1)
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WO2004038499A1 true WO2004038499A1 (fr) | 2004-05-06 |
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PCT/EP2003/050708 WO2004038499A1 (fr) | 2002-10-28 | 2003-10-13 | Systeme d'illumination pour visualisation d'images sans rupture de couleurs |
Country Status (9)
Country | Link |
---|---|
US (1) | US7461940B2 (fr) |
EP (1) | EP1557046A1 (fr) |
JP (1) | JP4642470B2 (fr) |
KR (1) | KR100997915B1 (fr) |
CN (1) | CN100417988C (fr) |
AU (1) | AU2003288267A1 (fr) |
FR (1) | FR2846435A1 (fr) |
MX (1) | MXPA05004473A (fr) |
WO (1) | WO2004038499A1 (fr) |
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US7267442B2 (en) * | 2004-10-20 | 2007-09-11 | Hewlett-Packard Development Company, L.P. | Pixelated color wobulation |
US7543943B1 (en) * | 2005-10-28 | 2009-06-09 | Hewlett-Packard Development Company, L.P. | Color permuting light projector |
HUP1000039A2 (en) * | 2010-01-22 | 2011-08-29 | Digital Recognition Systems Ltd Surrey Technology Ct | Shape recognizing camera and power supply for it |
JP2015145934A (ja) * | 2014-02-03 | 2015-08-13 | セイコーエプソン株式会社 | プロジェクター |
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US5416514A (en) * | 1990-12-27 | 1995-05-16 | North American Philips Corporation | Single panel color projection video display having control circuitry for synchronizing the color illumination system with reading/writing of the light valve |
EP0777390A2 (fr) * | 1995-11-28 | 1997-06-04 | Sharp Kabushiki Kaisha | Appareil d'affichage d'image par projection |
US20020008812A1 (en) * | 2000-02-14 | 2002-01-24 | Conner Arlie R. | Dot-sequential color display system |
US20020024618A1 (en) * | 2000-08-31 | 2002-02-28 | Nec Corporation | Field sequential display of color video picture with color breakup prevention |
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EP0492721B1 (fr) * | 1990-12-27 | 1997-03-12 | Koninklijke Philips Electronics N.V. | Dispositif d'affichage couleur et circuitrie d'adressage de la valve optique dudit dispositif |
US6273571B1 (en) * | 1995-05-23 | 2001-08-14 | Colorlink, Inc. | Display architectures using an electronically controlled optical retarder stack |
US5684498A (en) * | 1995-06-26 | 1997-11-04 | Cae Electronics Ltd. | Field sequential color head mounted display with suppressed color break-up |
US6215579B1 (en) * | 1998-06-24 | 2001-04-10 | Silicon Light Machines | Method and apparatus for modulating an incident light beam for forming a two-dimensional image |
US7046407B2 (en) * | 2000-02-14 | 2006-05-16 | 3M Innovative Properties Company | Diffractive color filter |
-
2002
- 2002-10-28 FR FR0213981A patent/FR2846435A1/fr active Pending
-
2003
- 2003-10-13 WO PCT/EP2003/050708 patent/WO2004038499A1/fr active Application Filing
- 2003-10-13 CN CNB2003801021236A patent/CN100417988C/zh not_active Expired - Fee Related
- 2003-10-13 JP JP2004546037A patent/JP4642470B2/ja not_active Expired - Fee Related
- 2003-10-13 AU AU2003288267A patent/AU2003288267A1/en not_active Abandoned
- 2003-10-13 KR KR1020057007131A patent/KR100997915B1/ko not_active IP Right Cessation
- 2003-10-13 US US10/532,179 patent/US7461940B2/en not_active Expired - Fee Related
- 2003-10-13 EP EP03780165A patent/EP1557046A1/fr not_active Withdrawn
- 2003-10-13 MX MXPA05004473A patent/MXPA05004473A/es active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5416514A (en) * | 1990-12-27 | 1995-05-16 | North American Philips Corporation | Single panel color projection video display having control circuitry for synchronizing the color illumination system with reading/writing of the light valve |
EP0777390A2 (fr) * | 1995-11-28 | 1997-06-04 | Sharp Kabushiki Kaisha | Appareil d'affichage d'image par projection |
US20020008812A1 (en) * | 2000-02-14 | 2002-01-24 | Conner Arlie R. | Dot-sequential color display system |
US20020024618A1 (en) * | 2000-08-31 | 2002-02-28 | Nec Corporation | Field sequential display of color video picture with color breakup prevention |
Also Published As
Publication number | Publication date |
---|---|
EP1557046A1 (fr) | 2005-07-27 |
CN100417988C (zh) | 2008-09-10 |
FR2846435A1 (fr) | 2004-04-30 |
US20060098169A1 (en) | 2006-05-11 |
JP2006504129A (ja) | 2006-02-02 |
AU2003288267A1 (en) | 2004-05-13 |
JP4642470B2 (ja) | 2011-03-02 |
CN1708722A (zh) | 2005-12-14 |
US7461940B2 (en) | 2008-12-09 |
KR20050072115A (ko) | 2005-07-08 |
KR100997915B1 (ko) | 2010-12-03 |
MXPA05004473A (es) | 2005-07-26 |
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